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JF-6G15 Tube Reverb 2U Rack Mount Preamp 


Model No. JF-6G15-RM
Series: Rack Mount Hot Rod Preamp              

MSRP - $895.00  


Add vintage pure tube driven  tank reverb to any amp...


JF-6G15 Tube Reverb Preamp


Model No. JF-6G15
Series: Open Chasis Hot Rod Preamp              

MSRP - $695.00  


Perfect for DIY Cabinet Builders!




The Frenzel JF-6G15  "Tube Reverb Preamp"  is part of our "Inspired" line of products inspired by the vintage 50's - 60's amps with the "TONES YOU KNOW.. It is designed to easily plug into either the input jack or the effects loop of  your amp and  give your amp those great classic Fender tube driven  tank coil reverb tones!  The unit is designed for maximum flexibility.  It provides two separate signal paths, one for the normal signal and one for the reverb signal.  The reverb signal is added in by adjusting the MIX control and can be turned on or off by a footswitch. 

Standard Features:

  • Input and Output Jacks isolated from chassis for low noise, eddy currents, and hum. 

  • DC on filaments for low 60 hz hum.  

  • Accutronic reverb tank coil for those vintage mellow and warm reverb tones. 

  • Footswitch Pedal - turns Reverb signal on and off

  • Dwell Control – sets level of reverb and gain of preamp

  • Tone Control – sets tone response.

  • Mix Control – adjust mix of normal and reverb signals.

  • Level Control – adjust output to match input level requirements of amp of effects loop.

  • Star ground system to reduce induced current chassis noise.

  • Standard IEC plug-in three prong grounded power cord.  

  • Classic Chicken Head Knobs, Toggle Switch and Pilot Light

  • Rock solid point-to-point hand wiring using only the best of parts...low noise tubular polypropylenes caps, metal film resistors, Micalex sockets, Neutrik jacks...etc. 

  • Tube compliment :  2 - 12AX7s, 1 - 12AT7 




  • TONE









  • FUSE


Electrical Specifications: 

  • Input Impedance:  1 megohm 

  • Level:  Instrument Level (100 millivolts RMS)

  • Output Impedance:  10K ohm

  • Output Level:  Line Level (1.5 volts RMS) 

Physical Data: 

  •  Dimensions -  2U Rackmount Chassis 19" W x 12" D x 3.5"H  -  Open Chassis 17" W x 10" D x 5"H 

  • Weight: 10 lbs. 

  • Chassis - Heavy gauge aluminum with welded corners.

  • Rock solid point-to-point hand wiring with military style tie-wrapped wiring harnesses for long life and reliability.

  • DC on filaments to eliminate 60 hz hum.

  • Star ground system to eliminate induced current chassis noise.

  • Input and Output Jacks isolated from chassis for low noise, eddy currents, and hum.

  • Classic Vintage Fender Control Knobs

  • Components - Only the highest quality parts are used including heavy duty transformers, low noise tubular polypropylenes capacitors, metal film resistors, Micalex sockets, Neutrik jacks. All parts are rated for commercial high use conditions. Wherever possible we use parts made in the USA.

Wiring View:  Hand-wired point-to-point for long-life and reliability.


  Sample Images -  Design May Vary Depending On Upgrades    

Upgrade Options:

These options allow you to  customize your amp to meet your special individual requirements.

240 VOLT POWER TRANSFORMER - for operation outside the USA  where 240VAC line voltage is used. Add $55.00

100 VOLT POWER TRANSFORMER - for operation outside the USA  where 100VAC line voltage is used. Add $55.00

"SURFER"VINTAGE TUBE TREMOLO  - pure tube tremolo for those vintage vibe tones. Great for surf music! Comes with Depth and Speed controls on front panel.and footswitch pedal. Add $75.00 


 Hey Jim, It sounds rich...perfect...fantastic! So happy together with my FM-5E3 Deluxe Plus!   I love this reverb! Getting lots of great sounds out of this "one" effect. Down right organic. Regards, Steve R. (St. Thomas, Virgin Islands)

CLICK HERE  For Follow-Up 10 Year Review By Steve Rockstein

For more reviews please check our Customers Reviews page.